The Diamagnetic Pendulum Science Tokyo Chiba Kiyota東京科学大学 千葉・清田研究室 2019-03-01 | In this video we show another example of magnetic levitation that uses the interaction between diamagnetic materials and permanent magnets.
Magnetically Levitated Motor with Single Axis Control Science Tokyo Chiba Kiyota東京科学大学 千葉・清田研究室 2022-03-25 | In this video we show a bearingless motor, a machine that integrates motor torque generation and magnetic levitation functions. This motor is passively stabilized in the radial direction by repulsive forces between permanent magnets. The thrust direction is regulated by an active control system.Rotational speeds up to 30000 rpm can be achieved with very low friction due to magnetic levitation.
Motor Levitated by Diamagnetic Material at Room Temperature Science Tokyo Chiba Kiyota東京科学大学 千葉・清田研究室 2022-03-25 | In this video we show a small electric motor that is levitated by a disc of pyrolytic graphite over a permanent magnet array. The diamagnetic graphite is repelled by the magnetic field and allows no contact suspension.
Introduction to Diamagnetic Levitation Science Tokyo Chiba Kiyota東京科学大学 千葉・清田研究室 2022-03-25 | In this video, we show magnetic levitation through the interaction of a diamagnetic graphite sheet and the magnetic field of a permanent magnet array.In the video we mention the Maglev Cobra project from the Federal University of Rio de Janeiro. For more information on this topic, we recommend watching the videos at the COPPE UFRJ channel:youtube.com/watch?v=Umbvw87jHE4youtube.com/watch?v=HGfsbQ7uzL8
The Floating Spinning Top Science Tokyo Chiba Kiyota東京科学大学 千葉・清田研究室 2019-03-29 | In this video we demonstrate the levitation of a floating spinning top. Full levitation is not achieved just through electromagnetic means. A fascinating mechanical phenomenon plays a major role in this experiment. It is the so called gyroscopic effect. Making this spinning top levitate at a stable position for the first time is not easy, but we give some directions on how to make it work.
Electrodynamic Damper Science Tokyo Chiba Kiyota東京科学大学 千葉・清田研究室 2019-03-03 | In this video we show the damping effects of eddy currents over a free falling permanent magnet sphere. Those currents are induced due to the magnetic flux variation inside a copper tube.
Demonstration of Electrodynamic Forces Science Tokyo Chiba Kiyota東京科学大学 千葉・清田研究室 2019-03-03 | In this video we show the interaction between a rotating permanent magnet and a thin copper sheet.Due to the magnetic flux variation, eddy currents are induced in the copper sheet. Due to the interaction between the current and the magnetic field, electromagnetic forces push the copper sheet. This principle can be applied to magnetic levitation machines.
A Magnetic Bearing Made With Permanent Magnets Science Tokyo Chiba Kiyota東京科学大学 千葉・清田研究室 2019-03-01 | In this video we show a passive magnetic bearing made with permanent magnets. It is a very basic structure similar to the ones used in actual motors with magnetic bearings. The permanent magnets distributed in a half circle shape provide a suspension force to the rotor. Even though those magnets make the rotor levitate in a centered position, they are not able to provide damping to radial oscillations and cause unstable forces in the axial direction. In this experiment, the rotor position is restricted by a mechanical contact, similar to the tip of a spinning top.
Electromagnetic Levitation: Making a Globe Float Over a Magnetic Base Science Tokyo Chiba Kiyota東京科学大学 千葉・清田研究室 2019-03-01 | In this video we demonstrate the electromagnetic levitation of a globe above a stage. To make this object float in a stable position we need to combine the effects of permanent magnets and controlled electromagnets. Full magnetic levitation is achieved inside the stability region.
Normal Spring x Damped Spring: A Mechanical Approach to Magnetic Levitation Science Tokyo Chiba Kiyota東京科学大学 千葉・清田研究室 2019-03-01 | This video is not about magnetic levitation itself, but rather an explanation of a basic mechanical concept that is important to understand magnetic levitation. We briefly introduce the differences between a mechanical system with just a spring and a mass and one with included damping effect.
Electromagnetic Levitation: Magnetic Globe Suspended by a Vertical Electromagnet Science Tokyo Chiba Kiyota東京科学大学 千葉・清田研究室 2019-03-01 | In this video we demonstrate one-axis levitation in the vertical direction. By combining the effects of permanent magnets and controlled electromagnets, it is possible to make this globe levitate. Since only the vertical position is controlled, the globe becomes similar to a magnetic pendulum inside the small stability region.
